Gas Non-Return Valve (FBR) GRS50 Brass G1 1/2 Female

Gas Safety Device – ISO 5175-2

Industrial gas safety device designed for the protection of ring lines, tapping points, and points of use in gas distribution systems. Manufactured in accordance with ISO 5175-2 (NV DF), this device operates without a flame arrestor and is flashback-resistant when compressed air is used as the oxidant.

Engineered for reliable performance with low, position-independent cracking pressure, it is suitable for controlled gas applications where system safety and flow stability are essential.

Technical Specifications

• Standard: ISO 5175-2

• Nominal diameter: DN 50

• Inlet / Outlet: G 1 1/2" RH Female (DIN ISO 228)

• Cracking pressure: 4–8 mbar (position-independent)

• Working pressure: up to 5 bar

• Inlet filter: 100 μm

• Temperature range: –20 °C to +70 °C

• Materials: Brass and Aluminium Alloy

Gas Compatibility

• For use with: natural gas, LPG, cleaned biogas

• Flashback-resistant when compressed air is used as oxidant

Key Features

• Protects ring lines, tapping points, and points of use

• Low cracking pressure for sensitive system response

• Robust industrial construction for long service life

• Designed for controlled gas distribution applications

• ISO 5175-2 compliant